Don't waste it anymore. Read something, the bible, Lord of the Rings, some inspiring stuff. Don't do porn, don't listen to music with sad/angry lyrics. Stop scrolling watching happy people in social media. Find a job. Go on a walk. Enter a community: local church, DnD discord server, fanart chats, something that seems interesting to you and talk to those people. I feel i wasted my years too, my career feels empty, my friends are in other countries, and i'm looking for a job again. I can't enjoy any hobbies or conversations, I try. I try very hard to live.